Dispensing – Inspection devices – Sight openings
Reexamination Certificate
2001-09-26
2003-06-10
Kaufman, Joseph A. (Department: 3754)
Dispensing
Inspection devices
Sight openings
C222S181300
Reexamination Certificate
active
06575334
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the field of viscous liquid dispensers, for example soap dispensers, shampoo and lotion dispensers, food product dispensers, and the like.
BACKGROUND OF THE INVENTION
Various configurations and models of liquid dispensers, particularly liquid soap dispensers, are well known in the art. Conventional dispensers typically employed in public restrooms and the like are wall mounted units that typically include a house or structure that is permanently affixed to a wall. These dispensers typically include an access door or member so that the dispenser can be opened by a maintenance person for refilling or servicing. With certain types of dispensers, separate refill cartridges are inserted into the housing structure. With other types of dispensers, the maintenance technician must directly refill a reservoir provided in the housing structure. The dispensers typically include a delivery device, such as a dosing pump, and a device such as a lever or button for actuating the dosing pump. The dispensers may be vented or unvented.
The conventional dispensers depend on the continued maintenance and operability of the housing structure that is permanently affixed to the wall. In other words, if the housing structure, and particularly the dosing pump, is damaged or vandalized, the dispenser becomes inoperable and must be replaced. The conventional dispensers also depend on a supply system wherein additional liquid soap must be separately stored, transported, and loaded into the dispensers. This process entails unnecessary logistic and man power resources.
The present invention is an improvement over existing systems in that it provides a disposable self-contained dispenser with a significantly increased capacity as compared to standard dispensers, is relatively inexpensive, and does not depend on the separate storage and delivery of refill cartridges or bulk volumes of liquid soap or other type of viscous product.
OBJECTS AND SUMMARY OF THE INVENTION
Objects and advantages of the invention will be set forth in part in the following description, or may be obvious from the description, or may be learned through practice of the invention.
The present invention provides a self-contained viscous liquid dispenser. Although having particular usefulness as a liquid soap dispenser, the dispenser according to the invention is not limited to a liquid soap dispenser and may be utilized in any application wherein it is desired to dispense metered doses of a viscous liquid. For example, the dispenser may have particular usefulness as a shampoo dispenser, lotion dispenser, food product dispenser (i.e., catsup, mustard, or mayonnaise dispenser), or any other product dispenser for dispensing metered amounts of a viscous substance. The liquid dispenser will be described herein with reference to a soap dispenser for ease of explanation.
The viscous liquid dispenser includes a housing that may be formed of any suitable material. For example, the housing may be molded from relatively inexpensive plastic materials and may have any desired aesthetic shape. The housing also defines an integral sealed internal liquid reservoir. In other words, the liquid reservoir is not a separate component from the housing, such as a cartridge or the like. The housing may be comprised of wall members that give the dispenser its outward appearance and also define the internal liquid reservoir.
A dispensing pump mechanism is disposed at least partially within the reservoir. The pump mechanism has a delivery end that extends out of the reservoir which is actuated by a user to dispense the viscous liquid.
The dispenser also includes a mounting mechanism that is configured as an integral component of the housing. The mounting mechanism allows the dispenser to be detachably connected to complimentary mounting structure on a wall surface. In this way, the dispenser may be easily removed from the wall surface for disposal or recycling once the liquid has been depleted. A new liquid dispenser according to the invention is then attached to the wall surface.
In one embodiment of the invention, the housing comprises a substantially vertical back side that is configured to be placed adjacent to the wall surface. The mounting mechanism is configured in the back side. For example, if the housing is a molded component, the mounting mechanism is molded integral with the back side. The mounting mechanism may comprise a recess that is defined in the back side. The recess may be defined by side walls that have engaging structures defined thereon. These engaging structures interlockingly engage with complimentary structure provided on the wall mounting structure. The wall mounting structure may be, for example, a plate member or similar device that is relatively permanently affixed to the wall. In one embodiment of the engaging structure, the vertical side walls of the recess include at least one angled surface on each vertical side wall. These angled surfaces engage against complimentary angled surfaces on the mounting wall structure similar to a conventional dove-tail configuration. The housing is slidable in a generally vertical direction onto the wall mounting structure so that the angled surfaces of the mounting mechanism slide into engagement against the angled surfaces of the wall mounting structure. Once engaged, the angled surfaces prevent the dispenser from being pulled away from the wall mounting structure. A securing device may be provided on the back side of the housing to prevent relative sliding movement between the housing and the wall mounting structure upon engagement of the angled surfaces. This securing device may be, for example, a simple protrusion disposed on the back side of the housing that engages in a complimentary recess or divot defined in the wall mounting structure. In an alternate embodiment, the protrusion or a locking nub may be provided on the wall mounting structure to engage in a complimentary recess or divot formed in the housing recess.
In one particular embodiment of the invention, the wall mounting structure is made of a relatively hard, rigid material (i.e., a metal or hard plastic bracket) and may have at least one dimension (i.e., width or depth) that is greater than the corresponding dimension of the housing recess. The housing may be formed of a material, such as plastic, having an inherent degree of “play” or resiliency. In this manner, upon mounting the housing onto the wall mounting structure, the greater dimension component of the mounting structure will cause the corresponding portion of the housing recess to “bow” or flex so as to accommodate the over-sized wall mounting structure. This configuration provides for an extremely secure and tight engagement between the housing and wall mounting structure that prevents the housing from wobbling or otherwise moving relative to the supporting wall. To a user, the housing will appear to be permanently bolted or otherwise mounted to the wall and there will be essentially no indication that the housing can be removed. Also, the housing cannot be pulled away or pried from the wall mounting structure without extreme force.
In one particularly useful embodiment, at least two spaced apart angled surfaces are provided on each vertical wall of the recess that engage against complimentary spaced apart angled surfaces on the wall structure. The spaced apart configuration of the angled surfaces maximizes the surface contact area between the housing and the wall mounting structure without significantly increasing the relative sliding distance between the members.
As mentioned, the housing structure is preferably formed from a relatively inexpensive molded plastic and may comprise separately molded components that are permanently affixed or adhered to each other. For example, the housing may include a front component that is formed separately from and adhered to a back component. It may be desired that the front and back components have different characteristics. For example, it may be desired that the back component
Bachtel Randall M.
Bennett Mark A.
Lewis Richard P.
Mahaffey Cleary E.
Mayberry Pamela J.
Dority & Manning
Kaufman Joseph A.
Kimberly--Clark Worldwide, Inc.
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